[Hallicrafters] Caps on Selectivity switch was: RE: SX-100 Knobs

Chris Kepus ckepus at comcast.net
Tue Jul 9 02:47:17 EDT 2013


David,

Thanks for the rundown on your component selections and attack on the
switch.  I had a gut feeling you figured out a way to get it done. Way to
go!  And thanks for the blow by blow description. After reading it, I
believe an appropriate characterization of your action is "intrepid".  

I got a couple of replies off list suggesting that anyone considering this
job might well first plot the current selectivity curves.  Their point is
that these caps are not exposed to B+ and even if there is a slight bit of
leakage, it might not have that much effect on the radio's selectivity.
And, if the radio is just going to be used for casual listening or on "Net"
night, that makes good sense.  OTOH, the Hakko could convert a daunting job
into a difficult but doable proposition.  

Yes, the Hakko makes this type of work so much more pleasurable.  Not to
mention getting it done faster, too.  Don't know how I got by without one...
:-)

Let us all know the final results of your efforts.  I am curious if the new
components have any effect on the radio's selectivity curves, sensitivity,
etc.

Good job!

73,
Chris
W7JPG




More information about the Hallicrafters mailing list